Interstellar objects like ‘Oumuamua could help form planets ESA/Hubble, NASA, ESO, M. Kornmesser
Parts of Earth may originally be from another part of the galaxy, having crossed light years to form the ground beneath our feet. That is the conclusion of a study suggesting that the Milky Way should be full of free-floating rocks like 鈥極umuamua, the interstellar asteroid聽that聽visited our solar system in October 2017, and they may act as seeds to form planets in nascent planetary systems.
Our traditional picture is that planets form聽out of discs of gas and fine dust around a star, but some observations…
